Air-compressor.



PATENTBD MAR. 17, 1903..

B. GASTAL.

AIR coMPREsso.

PP-LIOATION'FILED DBU. 24, 1900. BENEWBD FBB.I12, 1903.

2 sHBETs-SHBBT 1.

H0 MODEL.

I qu@ W/TNESSES:

.By WOHNEYS No..722.968. f PATENTED MAR. 17,1903.

B. GASTAL.

AIR COMPRESSOR.v

APPLICATION TILED DEO. 24, 1900. RENBWBD IBB. 12, 1903. X0 MODEL. 2 SHEETS-SHEET H 1 'u j e fig-5 i il 0 J l im lu w/r/vEssEs.- v (g /NvE/v'ro UNITED STATES,

PATENT OFFICE.

BENJAMIN GASTAL, OF PELOTAS, BRAZIL.

AIR-COMPRESSOR.

srCIFICATION forming part of Letters Patent No. 72 2,968, dated March 17, 1903. Application filed December 24, 1900 Renewed February 12, 1903. Serial No; 143,145. (No model.)

To a/ZZ whom t wtf/,y concern,.-

Beit known that I, BENJAMIN GASTAL, a citizen of the United States of Brazil, and a resident of Pelotas, in the Province of Rio Grande do Sul, Brazil, have invented certa-in new and useful Improvements in Air-Compressors, of which the following is a full, clear, and exact description.

My invention relates to devices for compressing air; and the object of my invention is to provide a simple and eflicient automatic device of the above-indicated class.

The invention will be fully described hereinafter and the features of novelty pointed out in the appended claims.

Reference is to be had to the accom pan-ying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is an elevation of theimprovement. Figs. 2 and 3 are sectional elevations of the upper and lower casings or cylinders, respectively. Fig. 4 is a sectional plan of thelower casing or cylinder on line 4 4 of Fig. 3. Fig. 5 is a side elevation of the same with partsv in section, and Fig. 6 is a detail sectional elevation on line 6'6 of Fig. 5.

In the drawings, A and B represent tw casings or cylinders to which water under pressure is conveyed by pipes e e', a deliverypipefbeing shown leading from the casing or cylinder A. The upper casing A is divided inwardly-opening valve b, held in a cage c,

controls the passage of air from the pipes d to the chambers l and 2. The lower casing B, as before stated, communicates at the top with the pipes a d. It is divided into two chambers 1 and 2, each of which in its upper portion contains a pivoted oat 11, connected by a rod L7'2 with the arm j of a shiftiug-leverj, fulcrumed at o. Preferably the lever is formed at its fulcrurn with a knifeedge, against which press spring-platesp, held in the bottom s. (See Fig. 6.) Thus the shifting-lever will be thrown quickly each time it passes its central position. The lower end of each leverj fits on a sliding rod m between two valves g g and h h', respectively. The rod m is guided by blocks l. The water-inlete' is located between the valves g and h, which are so spaced relatively to their seats that when one valve is seated the other will be open, allowing the inlet e to communicate with one of the chambers l 2'. The valves g h control the communication of the chambers 1" 2', respectively, with outlets q.

The operation' vis as follows: Supposing the parts to be in the position shown in Fig. 3, water passing through the pipes e e' will pass into the chamber 1 of the casing A and into the chamber 2 of the lower casing B. The

VWater will gradually fill the chamber 1, driving out the air therefrom through the pipe a at the top, the chamber l of the lower casing, and the outlet q at the left. At the same time the cham-ber 2 becomes filled until the float v1 is operated to throw the shifting-lever j and the valves g g' h h into the reverse position to that shown in Fig. 3. The Ioutlet q being thus disconnected from the chamber 1', the entrance of water from the pipe e to the chamber lis interrupted, while water passes 'verse'the position of the valves of the lower casingv Band atithe same time brings the float t' in the other chamber 2' into the lower position. The operation is then repeated, the air being forced alternately from thel chambers 1l and 2 into the chambers; 1 and 2, while some water escapes alternately from the chambers 1 and 2. As these latter are at a lower level than the chambers 1 and 2, the

IOO

water has a greater pressure in the lower casing B than in the upper casing A.

The pressure-pipes e e' may be connected With any suitable water-supply, as a tank, into which Water is conducted, or they may be connected with a water-main. l

kVarious modifications may be made Without departing from the nature of my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination of two casings or chambers each having an air-passage at the top, a liquid-passage at the bottom, a liquid-inlet adapted to communicate with said liquid-passages, and two liquid-outlets adapted to communicate with the respective liquid-passages, a fioat located in each casing and pivoted at one end to a xed part of the casing, a set of connected valves controlling the connection ot' said liquid-passages with the respective outlets and with the inlet, a shifting-lever fulcru med in the lower part of each chamber, a rod connecting the other end of each float with an arm on the shifting-lever, the said levers being operated by the iioats and arranged to actuate the valves, and a spring for throwing each lever quickly when it passes its central position.

2. The combination of two casings or chambers each having an air-passage at the top, a liquid-passage at the bottom, a liquid-inlet, and two liquid-outlets adapted to communicate with said liquid-passages of the casings, a ioat located in each casing and pivotally connected at one end thereto, a set of rigidlyconnected valves controlling the connection of said liquid-passages with the respective ver quickly when it passes a predetermined position. Y

3. The combination of two casings or chaml bers each having an air-passage at the top, a liquid-passage at the bottom, a liquid-inlet and two liquid-outlets adapted to communicate with said liquid-passages of the casings, a ioat pivoted in the upper part of each casing, a rod mounted to slide, valves arranged in pairs and rigidly connected with said rod for controlling the connection of said liquidpassages with the respective outlets and inlet, and shifting-levers connected with the sliding rod between the valves' of each pair to operate the valves, the said levers being each positively connected with one of said floats, so that the floats will move in unison, the movement of one float being transmitted to the other doat through the medium of the valves and shifting-levers.

et. A device of the character described, comprising two casings or chambers each having a valve-controlled air-pipe leading from the top thereof, a water-supply pipe connected with the chambers at the bottom, inlet-valves controlling the connection of said water-supply pi pe with the respective chambers, liquidoutlets connected with the respective chambers at the bottom, outlet-valves controlling the connections of said outlets with the respective chambers, the said inlet and outlet valves being on the same stem to move in unison, and so arranged that the inlet-valve of one chamber and the outlet-valve of the other chamber will be closed at the same time, floats arranged in each of said chambers and operatively connected with the valves thereof, and chambers with which the said air-pipes are connected and into which the air is discharged, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

BENJAMIN GASTAL.

Witnesses:

JoAs ABADIE, ADoLPHo DE OLIvIoN. 

